Abstract
Soil compaction can cause yield reductions in cotton (Gossypium hirsutum). This study investigated the effect of soil compaction on canopy spectral reflectance, soil electrical conductivity (EC), and cotton yield. Field experiments were conducted during 2003-2005 using a completely randomized block design with four soil compaction treatments. The treatments were no subsoiling (control); subsoiled, disked, and bedded (conventional); subsoiled and compacted (compaction I); and compacted with no subsoiling (compaction II). Field data were collected on soil resistance, canopy reflectance, soil EC, and cotton yield. Comparison of means showed differences between treatments in reflectance in 2003 and 2004, soil compaction parameters in 2004 and 2005, and soil EC and yield in 2005. The depth and thickness of the hardpan were significantly correlated to green NDVI on 16 September (R2 = 0.53) in 2003. Depth, average resistance of hard pan, and EC all showed relationships with yield in 2005. Their combination as independent variables could explain 65% of the variability in cotton yield in 2005. These results verified that compaction affected canopy reflectance and reduced cotton yield in Arkansas. The practical implications of the outcome of this study are the potential use of EC and canopy reflectance to infer crop yield and extent of soil compaction. However, a multi-site and multi-year study is necessary to confirm this possibility.
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Claims 12
Claim · model-written summary
Reflectance differed among compaction treatments in 2003 and 2004.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- treatmentse0
- Outcome
- reflectancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Comparison of means showed differences between treatments in reflectance in 2003 and 2004”
t0“Cotton”
Claim · model-written summary
Soil compaction parameters differed among treatments in 2004 and 2005.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- soil compaction parameterse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil compaction parameters in 2004 and 2005”
t0“Cotton”
Claim · model-written summary
Soil EC differed among treatments in 2005.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- soil ECe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil EC and yield in 2005”
t0“Cotton”
Claim · model-written summary
Yield differed among treatments in 2005.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil EC and yield in 2005”
t0“Cotton”
Claim · model-written summary
Hardpan depth and thickness correlated with green NDVI in 2003.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- green NDVIe0
- Value
- R2 = 0.53e0
- Qualifier
- depth and thickness of the hardpane0
- Setting
- 16 Septembere0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The depth and thickness of the hardpan were significantly correlated to green NDVI on 16 September (R2 = 0.53) in 2003.”
t0“Cotton”
Claim · model-written summary
Hardpan depth was related to yield in 2005.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- yielde0
- Qualifier
- Depthe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Depth, average resistance of hard pan, and EC all showed relationships with yield in 2005.”
t0“Cotton”
Claim · model-written summary
Hardpan resistance was related to yield in 2005.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- yielde0
- Qualifier
- average resistance of hard pane0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Depth, average resistance of hard pan, and EC all showed relationships with yield in 2005.”
t0“Cotton”
Claim · model-written summary
Soil EC was related to yield in 2005.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- yielde0
- Qualifier
- ECe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Depth, average resistance of hard pan, and EC all showed relationships with yield in 2005.”
t0“Cotton”
Claim · model-written summary
The combined soil variables explained 65% of cotton yield variability.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- variability in cotton yielde0
- Value
- 65%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Their combination as independent variables could explain 65% of the variability in cotton yield in 2005.”
t0“Cotton”
Claim · model-written summary
Compaction affected canopy reflectance.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- compactione0
- Outcome
- canopy reflectancee0
- Setting
- Arkansase0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compaction affected canopy reflectance and reduced cotton yield in Arkansas.”
t0“Cotton”
Claim · model-written summary
Compaction reduced cotton yield in Arkansas.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- compactione0
- Outcome
- cotton yielde0
- Direction
- reducede0
- Setting
- Arkansase0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compaction affected canopy reflectance and reduced cotton yield in Arkansas.”
t0“Cotton”
Claim · model-written summary
The authors propose EC and canopy reflectance to infer yield and compaction.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- potential use of EC and canopy reflectance to infer crop yield and extent of soil compactione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the potential use of EC and canopy reflectance to infer crop yield and extent of soil compaction.”
t0“Cotton”
The same questions in other papers
tillage · yield · Gossypium hirsutum (cotton)Positive and negative results
45 papers in the same direction as this paper · 113 in the opposite direction
- positive
- positive
- positive
155 papers more in this group
See all 159 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.